The landslides have caused extensive damage to NH 10 and NH 55, cutting off road and telecommunication link to Darjeeling and Sikkim.
Rescue operations were underway in three subdivisions of Darjeeling district where multiple landslides have claimed 38 lives besides washing away highways and damaging homes.
The human toll in the floods and relentless rain across the country reached almost 200 by Thursday, even as thousands in Gujarat, Rajasthan, Assam, Odisha, West Bengal, and elsewhere were forced out of their homes into temporary shelters.